Chemical Composition
As per DIN 267-4
Class | C max. | Mn min. | P max. | S max. |
---|---|---|---|---|
4, 5 and 6 | 0.50 | - | 0.110 | 0.150 |
8 | 0.58 | 0.30 | 0.060 | 0.150 |
10 | 0.58 | 0.30 | 0.048 | 0.058 |
12 | 0.58 | 0.45 | 0.048 | 0.058 |
Mechanical Properties
As per DIN 267-4
Property | Class 4 | Class 5 | Class 6 | Class 8 | Class 10 | Class 12 |
---|---|---|---|---|---|---|
Proof load stress (N/mm^2) | 400 | 500 | 600 | 800 | 1000 | 1200 |
Symbol | |4| | |5| | |6| | |8| | |10| | |12| |
Hardness Vickers HV5 max. | 302 | 302 | 302 | 302 | 353 | 353 |
Hardness Brinell HB max. | 290 | 290 | 290 | 290 | 335 | 335 |
Hardness Rockwell HRC max. | 30 | 30 | 30 | 30 | 36 | 36 |
Class 4 only applies for sizes above M16
Proof Load for Self-Colour or Zinc Nuts
As per DIN 267-4 for typical grades and sizes
Thread size | Class 8 N | Class 10 N | Class 12 N |
---|---|---|---|
M4 | 7000 | 8750 | 10500 |
M5 | 11400 | 14200 | 17000 |
M6 | 16000 | 20000 | 24000 |
M8 | 29000 | 36500 | 43000 |
M10 | 46000 | 58000 | 69500 |
M12 | 67000 | 84000 | 100000 |
M16 | 126000 | 157000 | 188000 |
M20 | 196000 | 245000 | 294000 |
M22 | 242000 | 303000 | 364000 |
M24 | 282000 | 353000 | 423000 |
M27 | 367000 | 459000 | 550000 |
M30 | 448000 | 561000 | 673000 |
M33 | 555000 | 694000 | 833000 |
M36 | 653000 | 817000 | 980000 |
M39 | 780000 | 976000 | 1170000 |
Nuts with proof load values exceeding 350kN (350 000 N) may be exempted from proof load testing and minimum hardness shall be agreed at the time of purchase.
Proof Load for Hot-Dip Galvanized Nuts with oversize thread
As per DIN 267-10 for typical grades and sizes
Thread size | Class 8 N | Class 10 N |
---|---|---|
M6 | 13100 | 17100 |
M8 | 25000 | 32600 |
M10 | 40700 | 52900 |
M12 | 60100 | 78100 |
M16 | 115000 | 150000 |
M20 | 188000 | 236000 |
M22 | 236000 | 295000 |
M24 | 273000 | 342000 |
M27 | 359000 | 450000 |
M30 | 440000 | 551000 |
M33 | 547000 | 685000 |
M36 | 645000 | 808000 |
See more in our products section for Nuts, Washers, Springs and other components
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